Exact(60)
This proves that u is a weak solution of (1.1).
Assume that y is a weak solution of Eq. (1.1).
(ii) is a weak solution of (1.1) on.
Then u is a weak solution of system (4.4 - 4.6 4.4 - 4.6
Furthermore, u is a weak solution of ((P_{eta})).
An -harmonic function,, is a weak solution to, when (3.3).
That is, u λ is a weak solution of (2.1).
Thus is a weak solution of the following equation: (2.13).
In particular, if and if is a weak solution to (1.7).
Suppose that is a weak solution of problem (1.1)–(1.4) and satisfies: (1).
where. is a weak solution of (3.3), if for any, we have (3.12).
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